What is Cloud computing?

What is  cloud computing:  cloud computing is a relatively new innovations in the field of computer Science.

This is one of the fields that has generated a lot of excitement both amongst users and organisations working in this field.

• Architecture enable customers to store their data on a central server and access it simultaneously from linked devices. 
• The content is accessed from the central server, therefore, if any changes are made to the stored information, it gets replicated on all devices that are linked to the cloud. Cloud allows users to store huge volumes of data centrally and access it using handheld devices such as smartphone and tablets.
•  Users do not need to worry about carrying the data with them and it provides flexibility and portability. These benefits have attracted a lot of users and organisations to opt for cloud based services.

What is Cloud computing?

• Technology is progressing by leaps and bounds. It is now possible to access your data anytime, anywhere, using a smartphone, tablets, laptop or desktop computer. To do this, all that you need is an internet connection. This has been made possible due to advancement in the field of cloud computing.
• In the simplest terms, cloud computing is the practice of storing and accessing data and applications using the internet. Cloud is metaphor for the internet. When you use a cloud service, your data is stored remotely on a server that is managed by the company whose cloud service you are using. Therefore, in case of Google cloud, your data is stored on Google server and not on your local hard drive. 
• Some of Microsoft (One drive), Google (Google Drive), Apple (iCloud), Dropbox, and so on.
• Cloud provider's rent out a limited amount of storage space on their servers to their customers that can be accessed from anywhere on any Dev ce using an interest connection. Cloud is an easy way to transfer large files. Most cloud provider's charge a fee for using cloud services such as storage, database, networking, analysis, etc.

Types of Cloud computing

• The front-end platform typically consists of desktop and web-based applications. This is the client part and it includes the interfaces and applications that are used to access cloud computing.
• The back-end platform refers to the actual cloud. It consists of servers for storing large volumes of data and all other resources that are used to provide cloud computing services, it includes virtual machines, security machanism, deployment model and other resource.
• Lastly, a cloud-based delivery accomplished using a transmission channel; such as internet, intranet or the intercloud.

Following are four types of cloud computing

Private Cloud : 

• This types of cloud supports private storage which can be both remote and local depending upon the database storage of the company. 
• Companies that have sensitive or fragile data opt for this service. To provide extra security features to this s storage, it is either managed internally by the company or is outsourced to a trustworthy vendor.

Public cloud : 

• A public cloud is the most common type of storage that is used. Most of us as individual customer have used this type of cloud service.
• It is operated remotely, owned by a cloud service provider and shared by multiple resource tenant's. It su a remote Storage service.

Community cloud :

• A community cloud is a collaborative effort in which storage is shared between several companies having common concerns, such as security, compliance and jurisdiction. 
• This cloud is also known as a semi-public or semi-private cloud. It can have either local or remote storage depending on the agreement between the companies sharing them.

Hybrid cloud: 

• A hybrid cloud is a combination of two or more different types of clouds, which retain their originality but are linked naked through a shared standard or technology. 
• This enables flow of data between different cloud structures while keeping their original benefits intact. Businesses derive greater flexibility and enhanced data deployment options.

Cloud Computing Services

• Cloud computing services are provided on Demy to users over the internet. The cloud service providers user their own servers to provide this service unlike a company using their on-premise servers.
• There are different types of cloud services which may or may not be necessary for end users, but are significant use to software developers.
• A fair understanding of cloud computing techniques helps to make an informed choice at the time of availing cloud services.
• The most prominent cloud services are related to infrastructure, storage, software and platform. Let's us discuss these one by one.

Iass in Cloud computing 

• Iass in cloud computing : This is the most commonly used cloud service. It includes virtual servers, storage risks and networks and provides a basic structure to an organisation which is manageable and flexible. 
• Customers can access and use the storage space that is provided using their handheld devices, such as smartphones to store data, including pictures, videos and music on the cloud.
• Some of the companies that offer infrastructure as a service (IasS) include amazon, FlexiScale and Rackspace.

Paas in cloud computing

• This is a cloud-based development platform designed for developers to build, run and manage applications over the internet. The PaaS infrastructure is built and managed by the cloud service provider who provides the software and hardware tools required for application development as services.
• Developers can run an operating system, database, or write code and execute that using a programming language. 
• The platform gives the developers the flexibility to focus on the applications they are running on the cloud services. The cloud provider deals with the complexities of maintaining and buildings the infrastructure to run these applications.

Saas in cloud computing

Software as a service means that the user's can access different software present on cloud on a pay-per-use-basis.

 The is a very useful service as software license are prohibitively expensive and it is not possible to license all such software.